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74ALS645A-1

NXP
Part Number 74ALS645A-1
Manufacturer NXP
Description Octal transceiver
Published Apr 3, 2005
Detailed Description INTEGRATED CIRCUITS 74ALS645A/74ALS645A–1 Octal transceiver (3–State) Product specification IC05 Data Handbook 1991 Jun...
Datasheet PDF File 74ALS645A-1 PDF File

74ALS645A-1
74ALS645A-1

Overview
INTEGRATED CIRCUITS 74ALS645A/74ALS645A–1 Octal transceiver (3–State) Product specification IC05 Data Handbook 1991 Jun 03 Philips Semiconductors Philips Semiconductors Product specification Octal transceiver (3-State) 74ALS645A/74ALS645A-1 FEATURES • Octal bidirectional bus interface • 3-State buffer outputs sink 24mA and source 15mA • Outputs are placed in high impedance state during power-off conditions PIN CONFIGURATION T/R 1 A0 A1 A2 A3 A4 2 3 4 5 6 7 8 9 20 VCC 19 OE 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7 • The -1 version sinks 48mA IOL within the +5% VCC range DESCRIPTION The 74ALS645A is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both transmit and receive directions.
The device features an output enable (OE) input for easy cascading and transmit/receive (R/T) input for direction control.
The 74ALS645A-1 is the same as the 74ALS645A except that both ports sink 48mA within the ±5% VCC range.
TYPICAL PROPAGATION DELAY 7.
0ns 7.
0ns TYPICAL SUPPLY CURRENT (TOTAL) 34mA 34mA 20-pin plastic DIP 20-pin plastic SOL A5 A6 A7 GND 10 SF00198 ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS645AN, 74ALS645A-1N 74ALS645AD, 744ALS645A-1D DRAWING NUMBER TYPE 74ALS645A 74ALS645A-1 SOT146-1 SOT163-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS A0 – A7, B0 – B7 OE T/R A0 – A7 B0 – B7 A0 – A7 B0 – B7 DESCRIPTION Data inputs Output Enable input (active-Low) Transmit/receive input A port outputs B port outputs A port outputs (-1 version) B port outputs (-1 version) 74ALS (U.
L.
) HIGH/LOW 1.
0/1.
0 1.
0/1.
0 1.
0/1.
0 750/240 750/240 750/480 750/480 LOAD VALUE HIGH/LOW 20µA/0.
1mA 20µA/0.
1mA 20µA/0.
1mA 15mA/24mA 15mA/24mA 15mA/48mA 15mA/48mA NOTE: One (1.
0) ALS unit load is defined as: 20µA in the High state and 0.
1mA in the Low state.
LOGIC SYMBOL IEC/IEEE SYMBOL 19 G3 3EN1 [BA] 1 3EN2 [AB] 2 3 4 5 6 7 8 9 A0 19 1 OE T/R B0 A1 A2 A3 A4 A5 A6 A7 2 3 4 ∇1 2...


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